Time series data of Rainfall in Tamil Nadu as per Statistical Hand Book 2020

Based on the data published in the Statistical Hand Book (SHB) – 2020 by the Department of Economics and Statistics, Government of Tamil Nadu, the graph arrived, as shown below, clearly exhibits the actual rain fall recorded against the normal rain fall in Tamil Nadu during the Period from 2005-06 to 2018-19.

Bi-monsoonal patterns dominate rainfall in the sub-agro-climatic zone of Tamil Nadu. Being situated on the eastern side of the Western Ghats, most parts of Tamil Nadu miss a substantial part of dependable rainfall in the south-west monsoon.

During the year under report, the actual rainfall recorded at 960 mm was low by 37.4% against the normal rainfall of 698.8 mm

Almost all of the districts of Tamil Nadu received less actual rainfall compared to the normal rainfall of each of the districts.

The Season-wise contribution of rainfall to the total rainfall during the year 2005-06 to 2018-19 is given below:

South-West monsoon

During the South–West Monsoon season, Tamil Nadu recorded an actual rainfall of 293.2 mm and the normal rainfall of 330.8 mm

North-East Monsoon Season

During the North-East Monsoon season, Tamil Nadu recorded an actual rainfall of 468 mm. and the normal rainfall of 351.8 mm. The comparison of rainfall recorded during the North-East Monsoon season with the normal rainfall shows that there is no “Excess” or “Normal” rainfall in any district.

Winter Season

During the Winter Season, Tamil Nadu recorded an actual rainfall of 32.9 mm. and the normal rainfall of 4.6 mm.

Hot-Weather Season

During the Hot-Weather season, Tamil Nadu recorded an actual rainfall of 128.2 mm. and the normal rainfall of 49.3 mm.

Resource Title: Time Series Data Rainfall by Seasons in Tamil Nadu : SHB 2020

Dataset URL: https://tn.data.gov.in/node/6885468#web_catalog_tabs_block_10